/* ── Header (same component as the reports page) ───────────────────── */
.header {
    background: var(--card-background);
    padding: 1rem 2rem;
    border-bottom: 2px solid var(--accent-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.back-btn {
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}
.back-btn:hover { background: var(--secondary-color); transform: translateY(-2px); }

.page-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-color);
    margin: 0;
}

.header-actions { display: flex; align-items: center; gap: 1rem; }

.theme-toggle {
    background: none;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.theme-toggle:hover { background: var(--accent-color); color: #fff; }

/* ── Page body ─────────────────────────────────────────────────────── */
.main-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
    color: var(--text-primary);
}

.rewards-intro {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
}
.rewards-intro > i { font-size: 2.2rem; color: #d4af37; }
.rewards-intro h2 { margin: 0 0 0.25rem; font-size: 1.2rem; color: var(--text-primary); }
.rewards-intro p { margin: 0; color: var(--text-secondary); font-size: 0.9rem; }

.rewards-loading, .rewards-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}
.rewards-loading i, .rewards-empty i { font-size: 2.5rem; margin-bottom: 0.75rem; display: block; opacity: 0.6; }
.rewards-empty.error i { color: var(--danger-color); }

.reward-board {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}
.reward-board-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}
.reward-board-header h3 { margin: 0.35rem 0 0.2rem; font-size: 1.1rem; color: var(--text-primary); }
.reward-kind-tag {
    display: inline-block;
    background: var(--secondary-color);
    color: #fff;
    font-size: 0.72rem;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
}
.reward-teacher { margin: 0; font-size: 0.82rem; color: var(--text-secondary); }
.my-rank-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(212, 175, 55, 0.18);
    color: #d4af37;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.85rem;
    white-space: nowrap;
}
.reward-message {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 0.7rem 0.9rem;
    margin: 0 0 1rem;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.reward-entries { display: flex; flex-direction: column; gap: 0.4rem; }
.reward-entry {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
}
.reward-entry-rank { min-width: 36px; text-align: center; font-size: 1.35rem; }
.reward-entry-rank .rank-number { font-size: 1rem; font-weight: 700; color: var(--text-secondary); }
.reward-entry-name { flex: 1; font-weight: 600; color: var(--text-primary); }
.reward-entry-score { font-weight: 700; color: var(--accent-color); }
.me-badge {
    background: var(--secondary-color);
    color: #fff;
    font-size: 0.68rem;
    padding: 0.08rem 0.45rem;
    border-radius: 999px;
    margin-inline-start: 0.35rem;
}

.medal-gold { color: #d4af37; }
.medal-silver { color: #9aa0a6; }
.medal-bronze { color: #cd7f32; }

.reward-entry.rank-gold { background: linear-gradient(90deg, rgba(212, 175, 55, 0.16), transparent); border-color: #d4af37; }
.reward-entry.rank-silver { background: linear-gradient(90deg, rgba(154, 160, 166, 0.16), transparent); border-color: #b8bcc2; }
.reward-entry.rank-bronze { background: linear-gradient(90deg, rgba(205, 127, 50, 0.16), transparent); border-color: #cd7f32; }
.reward-entry.rank-top10 { border-inline-start: 3px solid var(--secondary-color); }
.reward-entry.is-me { outline: 2px solid var(--secondary-color); }

.reward-empty { text-align: center; color: var(--text-secondary); padding: 1rem; }

/* ── Exam Boards Grid ────────────────────────────────────────────── */
.exam-boards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

.exam-board-card {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.exam-board-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--accent-color);
}

.exam-board-card i {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.exam-board-card h4 {
    margin: 0;
    font-size: 1.1rem;
}

.exam-board-card p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ── Modal ────────────────────────────────────────────────────────── */
/* ── Modal ────────────────────────────────────────────────────────── */
.modal {
    display: none; 
    position: fixed; 
    z-index: 1000; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgba(0,0,0,0.6); 
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--card-background);
    margin: 5% auto; 
    padding: 1.5rem 1.5rem 2rem 1.5rem;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 600px;
    border-radius: 16px;
    position: relative;
    color: var(--text-primary);
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.close-btn {
    color: var(--text-secondary);
    position: absolute;
    top: 15px;
    left: 20px; /* rtl */
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s, transform 0.2s, opacity 0.2s, filter 0.2s;
    background: var(--bg-secondary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    z-index: 10;
}

.close-btn:hover {
    color: #fff;
    background: var(--danger-color);
    transform: scale(1.05);
}

/* Remove double-box effect for modal board */
.modal-board {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    margin: 0 !important;
    background: transparent !important;
}

.modal-board .reward-board-header {
    margin-top: 0.5rem;
    padding-left: 2rem; /* space for close button */
}